The current owner of these is looking to restore the gold filled case but it is missing a part. The part is one of the spring clips that allow the case to slide and flip. They have a fixed post on one side and a small ball bearing on the other.
If you have any for sale please PM me and advise of asking price.

Mo-

“Someday, and that day may never come, I’ll call upon you to do a service for me. But, until that day, accept this justice as a gift”